Question

求解一道数学题已知：㎡+9n的平方+6m+6n+10=0求 (㎡-6mn+9n的平方）除以（m-3n)-(4㎡-9n的平

Answer 1

(m²+6m+9)+(9n²+6n+1)=0

(m+3)²+(3n+1)=0

所以m+3=0,2n+1=0

m=-3,n=-1/3

原式=(m-3n)²/(m-3n)-(2m+3n)(2m-3n)/(2m-3n)

=m-3n-2m-3n

=-n-6n

=3+2

=5